[Bug tree-optimization/103857] implement ternary without jump (and comparison)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103857

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |missed-optimization
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement
   Last reconfirmed|                            |2021-12-29

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase:
int f(int a, int b, int c)
{
  if (a != b && a != c) __builtin_unreachable();
  return a == b ? b : c;
}

This should just translate into:
int f1(int a, int b, int c)
{
  if (a != b && a != c) __builtin_unreachable();
  return a;
}

The ^ part is not needed really if it is just selecting between two values.